docs: def get_context_data(self, **kwargs):
          """ Returns the context data to provide to the template. """
          context = super().get_context_data(**kwargs)
  
          # Handles the preview of the poll
          if context['poll_option_formset']:
              if hasattr(self, 'poll_preview') and self.poll_preview:
                  context['poll_preview'] = self.poll_preview
                  context['poll_options_previews'] = filter(
                      lambda f: f['text'].value() and not f['DELETE'].value(),
                      context['poll_option_formset'].forms,
                  )
  
          return context